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Message-ID: <20250318180303.283401-7-seanjc@google.com>
Date: Tue, 18 Mar 2025 11:03:01 -0700
From: Sean Christopherson <seanjc@...gle.com>
To: Paolo Bonzini <pbonzini@...hat.com>
Cc: kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
Sean Christopherson <seanjc@...gle.com>
Subject: [GIT PULL] KVM: x86: SVM changes for 6.15
Misc cleanups, a pile of fixes related to SNP's AP Creation hypercall, and
support for Idle HLT interception.
Note, Manali wrote a selftest for Idle HLT, but unfortunately it can't be
merged at this time as the test has no way to know if _KVM_ support Idle HLT;
the CPUID feature bit enumerates KVM emulation of Idle HLT for nested VMs,
and there was no strong reason to expose a module param, let alone a capability.
The following changes since commit a64dcfb451e254085a7daee5fe51bf22959d52d3:
Linux 6.14-rc2 (2025-02-09 12:45:03 -0800)
are available in the Git repository at:
https://github.com/kvm-x86/linux.git tags/kvm-x86-svm-6.15
for you to fetch changes up to 4e96f010afb2815e33c9b15a695e0e0b4cb3cea6:
KVM: SVM: Invalidate "next" SNP VMSA GPA even on failure (2025-03-03 07:34:56 -0800)
----------------------------------------------------------------
KVM SVM changes for 6.15
- Ensure the PSP driver is initialized when both the PSP and KVM modules are
built-in (the initcall framework doesn't handle dependencies).
- Use long-term pins when registering encrypted memory regions, so that the
pages are migrated out of MIGRATE_CMA/ZONE_MOVABLE and don't lead to
excessive fragmentation.
- Add macros and helpers for setting GHCB return/error codes.
- Add support for Idle HLT interception, which elides interception if the vCPU
has a pending, unmasked virtual IRQ when HLT is executed.
- Fix a bug in INVPCID emulation where KVM fails to check for a non-canonical
address.
- Don't attempt VMRUN for SEV-ES+ guests if the vCPU's VMSA is invalid, e.g.
because the vCPU was "destroyed" via SNP's AP Creation hypercall.
- Reject SNP AP Creation if the requested SEV features for the vCPU don't
match the VM's configured set of features.
- Misc cleanups
----------------------------------------------------------------
Ge Yang (1):
KVM: SEV: Use long-term pin when registering encrypted memory regions
Manali Shukla (2):
x86/cpufeatures: Add CPUID feature bit for Idle HLT intercept
KVM: SVM: Add Idle HLT intercept support
Melody Wang (2):
KVM: SVM: Convert plain error code numbers to defines
KVM: SVM: Provide helpers to set the error code
Nikunj A Dadhania (1):
KVM: SEV: Use to_kvm_sev_info() for fetching kvm_sev_info struct
Sean Christopherson (11):
crypto: ccp: Add external API interface for PSP module initialization
KVM: SVM: Ensure PSP module is initialized if KVM module is built-in
KVM: SVM: Inject #GP if memory operand for INVPCID is non-canonical
KVM: SVM: Refuse to attempt VRMUN if an SEV-ES+ guest has an invalid VMSA
KVM: SVM: Don't change target vCPU state on AP Creation VMGEXIT error
KVM: SVM: Require AP's "requested" SEV_FEATURES to match KVM's view
KVM: SVM: Simplify request+kick logic in SNP AP Creation handling
KVM: SVM: Use guard(mutex) to simplify SNP AP Creation error handling
KVM: SVM: Mark VMCB dirty before processing incoming snp_vmsa_gpa
KVM: SVM: Use guard(mutex) to simplify SNP vCPU state updates
KVM: SVM: Invalidate "next" SNP VMSA GPA even on failure
arch/x86/include/asm/cpufeatures.h | 1 +
arch/x86/include/asm/sev-common.h | 12 +-
arch/x86/include/asm/svm.h | 5 +-
arch/x86/include/uapi/asm/svm.h | 2 +
arch/x86/kvm/svm/sev.c | 380 +++++++++++++++++--------------------
arch/x86/kvm/svm/svm.c | 39 +++-
arch/x86/kvm/svm/svm.h | 39 +++-
drivers/crypto/ccp/sp-dev.c | 14 ++
include/linux/psp-sev.h | 9 +
9 files changed, 269 insertions(+), 232 deletions(-)
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